fix: 修复卡片description处理逻辑

- 书签导入时保持description为空
- 所有页面站点卡片的空description显示为URL

src/bookmark-processor.js

@@ -158,7 +158,7 @@ function parseBookmarks(htmlContent) {
         name: name,
         url: url,
         icon: icon,
-        description: name
+        description: ''
       });
     }
     

templates/components/site-card.hbs

@@ -1,7 +1,7 @@
 {{#if url}}
-<a href="{{url}}" class="site-card{{#if style}} site-card-{{style}}{{/if}}" title="{{name}} - {{description}}" {{#if external}}target="_blank" rel="noopener"{{/if}}>
+<a href="{{url}}" class="site-card{{#if style}} site-card-{{style}}{{/if}}" title="{{name}} - {{#if description}}{{description}}{{else}}{{url}}{{/if}}" {{#if external}}target="_blank" rel="noopener"{{/if}}>
     <i class="{{#if icon}}{{icon}}{{else}}fas fa-link{{/if}}"></i>
     <h3>{{#if name}}{{name}}{{else}}未命名站点{{/if}}</h3>
-    <p>{{description}}</p>
+    <p>{{#if description}}{{description}}{{else}}{{url}}{{/if}}</p>
 </a>
 {{/if}}